摘要
为揭示丛枝菌根真菌(AMF)提高沙棘抗旱性的机制,对与沙棘菌根化苗木的抗旱性相关生理生化指标进行了研究。结果表明干旱胁迫条件下,随着AMF侵染率的增加,叶片的超氧化物歧化酶(SOD)活性增加,膜脂过氧化产物丙二醛(MDA)含量和细胞质膜相对透性(RP)降低。AMF侵染率较高的植物体内SOD活性维持较高水平,可有效清除宿主植物体内因干旱胁迫而积累的超氧自由基,降低MDA含量和细胞质膜相对透性,减轻膜脂过氧化造成的伤害程度,增强了植物的抗旱性。
Various physiological and biochemical indexes of mycorrhizal seedlings of Hippophae rhamnoides and their relations with drought resistance under water stress condition were studied. The results showed that the activities of superoxide dismutase ( SOD) increased gradually, the content of malondialdehyde ( MDA) and relative permeability ( RP) of plasma membrane decreased slowly with the arbuscular mycorrhizal fungi ( AMF) mycorrhizal infection rate increased. Also, the SOD activity can not be only kept at high level in the plant with a high infection rate of AMF, but can efficiently decrease the accumulated superoxide free radical, degrade the content of MDA and RP, relieve the damage degree from water stress, and enhance drought resistance as well.
出处
《西北林学院学报》
CSCD
北大核心
2003年第4期29-31,共3页
Journal of Northwest Forestry University
基金
国家自然科学基金(39770027)
杨凌示范区专项基金(99KJ22)
关键词
丛枝菌根真菌
沙棘
抗旱性
arbuscular mycorrhizal fungi
Hippophae rhamnoides
drought resistance
